98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
// Boost.Geometry Index
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//
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// n-dimensional Indexable validity check
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//
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// Copyright (c) 2011-2014 Adam Wulkiewicz, Lodz, Poland.
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//
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// This file was modified by Oracle on 2020-2021.
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// Modifications copyright (c) 2020-2021 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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//
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_INDEX_DETAIL_ALGORITHMS_IS_VALID_HPP
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#define BOOST_GEOMETRY_INDEX_DETAIL_ALGORITHMS_IS_VALID_HPP
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#include <cstddef>
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#include <boost/geometry/core/access.hpp>
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#include <boost/geometry/core/coordinate_dimension.hpp>
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#include <boost/geometry/core/static_assert.hpp>
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namespace boost { namespace geometry { namespace index { namespace detail {
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namespace dispatch {
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template <typename Box,
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std::size_t Dimension = geometry::dimension<Box>::value>
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struct is_valid_box
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{
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static inline bool apply(Box const& b)
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{
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return is_valid_box<Box, Dimension - 1>::apply(b) &&
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( get<min_corner, Dimension - 1>(b) <= get<max_corner, Dimension - 1>(b) );
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}
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};
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template <typename Box>
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struct is_valid_box<Box, 1>
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{
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static inline bool apply(Box const& b)
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{
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return get<min_corner, 0>(b) <= get<max_corner, 0>(b);
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}
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};
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template <typename Indexable,
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typename Tag = typename geometry::tag<Indexable>::type>
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struct is_valid
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{
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BOOST_GEOMETRY_STATIC_ASSERT_FALSE(
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"Not implemented for this Indexable type.",
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Indexable, Tag);
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};
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template <typename Indexable>
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struct is_valid<Indexable, point_tag>
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{
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static inline bool apply(Indexable const&)
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{
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return true;
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}
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};
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template <typename Indexable>
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struct is_valid<Indexable, box_tag>
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{
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static inline bool apply(Indexable const& b)
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{
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return dispatch::is_valid_box<Indexable>::apply(b);
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}
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};
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template <typename Indexable>
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struct is_valid<Indexable, segment_tag>
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{
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static inline bool apply(Indexable const&)
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{
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return true;
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}
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};
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} // namespace dispatch
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template <typename Indexable>
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inline bool is_valid(Indexable const& b)
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{
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// CONSIDER: detection of NaNs
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// e.g. by comparison of b with copy of b
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return dispatch::is_valid<Indexable>::apply(b);
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}
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}}}} // namespace boost::geometry::index::detail
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#endif // BOOST_GEOMETRY_DETAIL_INDEX_ALGORITHMS_IS_VALID_HPP
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